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2 years ago

Warm air is _ dense than cold air, and warm air holds _ moisture than cold air.

Physics

1 answer:

trasher [3.6K]2 years ago

4 0

Answer:

Warm air is less dense than cold air, and warm air holds more moisture than cold air.

Explanation:

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Indica si las siguientes acciones son el resultado de un efecto estatico o dinamico de una fuerza.

Oduvanchick [21]

Answer:

Sabemos por definición que la fuerza es lo que es capaz de producir cambios o deformaciones en un cuerpo y a esto se denomina efecto estático y cuando la alteración ejerce movimiento o reposo se denomina efecto dinámico, con esta base resolvemos que:

-estirar un muelle: efecto estatico

- devolver una volea: efecto dinámico

- aplastar la plastilina: efecto estático

- empujar el carro del supermercado: efecto dinámico

- inflar un globo: efecto estático

8 0

3 years ago

a student throws a coin vertically downward frok the top of a building. the coin leaves the throwers hand with a speed of 15.0m/

Elina [12.6K]

Answer:

Final speed after 2 seconds = 34.6 m/s

Explanation:

Given:

Initial speed of coin (u) = 15 m/s

Time taken = 2 seconds

Find:

Final speed after 2 seconds

Computation:

Gravitational acceleration of earth = 9.8 m/s²

Using first equation of motion;

v = u + at

v = u + gt

where,

v = final velocity

u = initial velocity

g = Gravitational acceleration

t = time taken

v = 15 + 9.8(2)

v = 15 + 19.6

Final speed after 2 seconds = 34.6 m/s

8 0

3 years ago

A drag racing vehicle travels from 0 to 100mph north in 5 seconds. What is the acceleration

kap26 [50]

The acceleration of the car is $8.9 m/s^2$

Explanation:

The acceleration of an object is given by

$a=\frac{v-u}{t}$

where

v is the final velocity

u is the initial velocity

t is the time elapsed

Here we have to convert the initial and final velocity of the vehicle into SI units. So we have:

$u = 0$ is the initial velocity

$v=100 mph \cdot \frac{1609 m/mi}{3600 s/h}=44.7 m/s$ is the final velocity

t = 5 s is the time elapsed

Solving for a, we find the acceleration:

$a=\frac{44.7-0}{5}=8.9 m/s^2$

Learn more about acceleration:

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brainly.com/question/2562700

#LearnwithBrainly

5 0

4 years ago

A 70.0-kg skier is sliding at 4 m/s when they slide down a 2m high hill. At the bottom of the hill they run into a large 2800 N/

Katarina [22]

Answer:

$\Delta x=245\ mm$

Explanation:

Given:

mass of skier, $m=70\ kg$

initial velocity of skier, $u=4\ m.s^{-1}$

height of the hill, $h=2\ m$

spring constant, $k=2800\ N.m^{-1}$

final velocity of skier before coming in contact of spring:

Using eq. of motion:

$v^2=u^2+gh$

$v^2=4^2+9.8\times 2$

$v=5.9666\ m.s^{-1}$

Now the time taken by the skier to reach down:

$v=u+gt$

$5.9666=4+9.8\ t$

$t=0.2007\ s$

Now we calculate force using Newton's second law:

$F=\frac{dp}{dt}$

$F=\frac{m(v-u)}{t}$

$F=\frac{70\times(5.9666-4)}{0.2007}$

$F\approx686\ N$

∴Compression in spring before the skier momentarily comes to rest:

$\Delta x=\frac{F}{k}$

$\Delta x=\frac{686}{2800}$

$\Delta x=0.245\ m$

$\Delta x=245\ mm$

4 0

3 years ago

Traditional Indonesian music uses an ensemble called a gamelan that is based on tuned percussion instruments somewhat like gongs

Vlada [557]

Answer:

n = 10 beats

Explanation:

Given:

- Frequency of note f1 = 151 Hz

- Frequency of note f2 = 155 Hz

- The total time they ring t = 2.5 s

Find:

How many beats are heard

Solution:

- The frequency of beat (fb) is the difference between the two frequencies of notes as follows:

fb = f2 - f1

fb = 155 - 151

fb = 4 Hz

- The number of beats per second is also called beat frequency:

n = fb*t

n = 4*2.5

n = 10 beats

3 0

4 years ago

Warm air is _____ dense than cold air, and warm air holds _____ moisture than cold air.

Warm air is _ dense than cold air, and warm air holds _ moisture than cold air.